CVE-2024-9476 is a privilege escalation vulnerability identified in Grafana Labs' Grafana OSS and Enterprise editions, specifically versions 11.2.0 and 11.3.0. The flaw resides in the Grafana Cloud Migration Assistant component, which is designed to facilitate migration tasks across organizations within a single Grafana instance. Grafana supports an Organizations feature that logically isolates resources, dashboards, and data sources between different organizational units or tenants. This vulnerability allows a user with privileges in one organization to escalate their access and retrieve resources from other organizations within the same instance, bypassing intended isolation controls. The root cause is linked to improper access control enforcement (CWE-266: Incorrect Access Control) in the migration assistant, which fails to adequately verify organizational boundaries during resource access. Exploitation requires an attacker to have some level of authenticated access (privileged user) and user interaction but does not require additional authentication steps. The vulnerability has a CVSS 4.0 score of 5.1 (medium severity), reflecting its limited attack vector (local access) and the requirement for user interaction, but significant confidentiality impact due to cross-organization data exposure. No public exploits or active exploitation have been reported to date. This vulnerability is particularly relevant for multi-tenant Grafana deployments where organizations rely on strict separation of data and dashboards. The flaw could lead to unauthorized data disclosure and potential compliance violations if sensitive information is accessed across organizational boundaries.

For European organizations, the impact of CVE-2024-9476 can be significant, especially for those using Grafana in multi-organization or multi-tenant environments such as managed service providers, large enterprises, or public sector entities. Unauthorized access to dashboards, metrics, and data sources from other organizations can lead to confidentiality breaches, exposing sensitive operational, business, or personal data. This could result in regulatory non-compliance under GDPR and other data protection laws, reputational damage, and potential financial penalties. Additionally, the breach of organizational boundaries undermines trust in the platform's security model and could facilitate further lateral movement or data exfiltration within affected environments. Although the vulnerability does not directly impact availability or integrity, the confidentiality impact alone is critical for organizations handling sensitive or regulated data. The requirement for authenticated access limits the attack surface to insiders or compromised accounts, but the risk remains substantial in environments with multiple organizations sharing a Grafana instance.

To mitigate CVE-2024-9476, organizations should: 1) Monitor Grafana Labs announcements closely and apply security patches promptly once released, as no patches are currently available. 2) Restrict access to the Grafana Cloud Migration Assistant feature to only trusted administrators and limit its use to necessary scenarios. 3) Review and tighten role-based access controls (RBAC) within Grafana to minimize privileges granted to users, especially those with cross-organization access. 4) Conduct audits of organization boundaries and resource access logs to detect any anomalous cross-organization access attempts. 5) Consider isolating critical organizations into separate Grafana instances to reduce risk exposure. 6) Implement network segmentation and strong authentication controls to reduce the likelihood of compromised accounts being used to exploit this vulnerability. 7) Educate users about the risks of privilege escalation and enforce least privilege principles. These steps go beyond generic advice by focusing on limiting the attack surface specific to the migration assistant and organizational isolation features.